diff options
Diffstat (limited to 'fs/nfsd')
| -rw-r--r-- | fs/nfsd/fault_inject.c | 8 | ||||
| -rw-r--r-- | fs/nfsd/nfs4state.c | 122 | ||||
| -rw-r--r-- | fs/nfsd/state.h | 7 |
3 files changed, 122 insertions, 15 deletions
diff --git a/fs/nfsd/fault_inject.c b/fs/nfsd/fault_inject.c index a444d821d2a5..d4472cd19807 100644 --- a/fs/nfsd/fault_inject.c +++ b/fs/nfsd/fault_inject.c @@ -146,11 +146,9 @@ static struct nfsd_fault_inject_op inject_ops[] = { }, { .file = "forget_openowners", - .get = nfsd_inject_get, - .set_val = nfsd_inject_set, - .set_clnt = nfsd_inject_set_client, - .forget = nfsd_forget_client_openowners, - .print = nfsd_print_client_openowners, + .get = nfsd_inject_print_openowners, + .set_val = nfsd_inject_forget_openowners, + .set_clnt = nfsd_inject_forget_client_openowners, }, { .file = "forget_delegations", diff --git a/fs/nfsd/nfs4state.c b/fs/nfsd/nfs4state.c index 48ae0a66d512..20bffa8c976c 100644 --- a/fs/nfsd/nfs4state.c +++ b/fs/nfsd/nfs4state.c @@ -5965,30 +5965,136 @@ nfsd_inject_forget_locks(struct nfsd_fault_inject_op *op, u64 max) return count; } -static u64 nfsd_foreach_client_open(struct nfs4_client *clp, u64 max, void (*func)(struct nfs4_openowner *)) +static u64 +nfsd_foreach_client_openowner(struct nfs4_client *clp, u64 max, + struct list_head *collect, + void (*func)(struct nfs4_openowner *)) { struct nfs4_openowner *oop, *next; + struct nfsd_net *nn = net_generic(current->nsproxy->net_ns, + nfsd_net_id); u64 count = 0; + lockdep_assert_held(&nn->client_lock); + + spin_lock(&clp->cl_lock); list_for_each_entry_safe(oop, next, &clp->cl_openowners, oo_perclient) { - if (func) + if (func) { func(oop); - if (++count == max) + if (collect) { + atomic_inc(&clp->cl_refcount); + list_add(&oop->oo_perclient, collect); + } + } + ++count; + /* + * Despite the fact that these functions deal with + * 64-bit integers for "count", we must ensure that + * it doesn't blow up the clp->cl_refcount. Throw a + * warning if we start to approach INT_MAX here. + */ + WARN_ON_ONCE(count == (INT_MAX / 2)); + if (count == max) break; } + spin_unlock(&clp->cl_lock); + + return count; +} +static u64 +nfsd_print_client_openowners(struct nfs4_client *clp) +{ + u64 count = nfsd_foreach_client_openowner(clp, 0, NULL, NULL); + + nfsd_print_count(clp, count, "openowners"); return count; } -u64 nfsd_forget_client_openowners(struct nfs4_client *clp, u64 max) +static u64 +nfsd_collect_client_openowners(struct nfs4_client *clp, + struct list_head *collect, u64 max) { - return nfsd_foreach_client_open(clp, max, release_openowner); + return nfsd_foreach_client_openowner(clp, max, collect, + unhash_openowner_locked); } -u64 nfsd_print_client_openowners(struct nfs4_client *clp, u64 max) +u64 +nfsd_inject_print_openowners(struct nfsd_fault_inject_op *op) { - u64 count = nfsd_foreach_client_open(clp, max, NULL); - nfsd_print_count(clp, count, "open files"); + struct nfs4_client *clp; + u64 count = 0; + struct nfsd_net *nn = net_generic(current->nsproxy->net_ns, + nfsd_net_id); + + if (!nfsd_netns_ready(nn)) + return 0; + + spin_lock(&nn->client_lock); + list_for_each_entry(clp, &nn->client_lru, cl_lru) + count += nfsd_print_client_openowners(clp); + spin_unlock(&nn->client_lock); + + return count; +} + +static void +nfsd_reap_openowners(struct list_head *reaplist) +{ + struct nfs4_client *clp; + struct nfs4_openowner *oop, *next; + + list_for_each_entry_safe(oop, next, reaplist, oo_perclient) { + list_del_init(&oop->oo_perclient); + clp = oop->oo_owner.so_client; + release_openowner(oop); + put_client(clp); + } +} + +u64 +nfsd_inject_forget_client_openowners(struct nfsd_fault_inject_op *op, + struct sockaddr_storage *addr, size_t addr_size) +{ + unsigned int count = 0; + struct nfs4_client *clp; + struct nfsd_net *nn = net_generic(current->nsproxy->net_ns, + nfsd_net_id); + LIST_HEAD(reaplist); + + if (!nfsd_netns_ready(nn)) + return count; + + spin_lock(&nn->client_lock); + clp = nfsd_find_client(addr, addr_size); + if (clp) + count = nfsd_collect_client_openowners(clp, &reaplist, 0); + spin_unlock(&nn->client_lock); + nfsd_reap_openowners(&reaplist); + return count; +} + +u64 +nfsd_inject_forget_openowners(struct nfsd_fault_inject_op *op, u64 max) +{ + u64 count = 0; + struct nfs4_client *clp; + struct nfsd_net *nn = net_generic(current->nsproxy->net_ns, + nfsd_net_id); + LIST_HEAD(reaplist); + + if (!nfsd_netns_ready(nn)) + return count; + + spin_lock(&nn->client_lock); + list_for_each_entry(clp, &nn->client_lru, cl_lru) { + count += nfsd_collect_client_openowners(clp, &reaplist, + max - count); + if (max != 0 && count >= max) + break; + } + spin_unlock(&nn->client_lock); + nfsd_reap_openowners(&reaplist); return count; } diff --git a/fs/nfsd/state.h b/fs/nfsd/state.h index 028947688d57..faaf6af7b28d 100644 --- a/fs/nfsd/state.h +++ b/fs/nfsd/state.h @@ -488,11 +488,14 @@ u64 nfsd_inject_forget_client_locks(struct nfsd_fault_inject_op *, struct sockaddr_storage *, size_t); u64 nfsd_inject_forget_locks(struct nfsd_fault_inject_op *, u64); -u64 nfsd_forget_client_openowners(struct nfs4_client *, u64); +u64 nfsd_inject_print_openowners(struct nfsd_fault_inject_op *); +u64 nfsd_inject_forget_client_openowners(struct nfsd_fault_inject_op *, + struct sockaddr_storage *, size_t); +u64 nfsd_inject_forget_openowners(struct nfsd_fault_inject_op *, u64); + u64 nfsd_forget_client_delegations(struct nfs4_client *, u64); u64 nfsd_recall_client_delegations(struct nfs4_client *, u64); -u64 nfsd_print_client_openowners(struct nfs4_client *, u64); u64 nfsd_print_client_delegations(struct nfs4_client *, u64); #else /* CONFIG_NFSD_FAULT_INJECTION */ static inline int nfsd_fault_inject_init(void) { return 0; } |